I've been trying to find some raised clip-ons for me nc30, but I after a lot of searching i'm trying sv650 clip-ons, there 41mm and pretty much bolt straight on, I've only tried on the left one so far (I only bought one to see it they'd fit). Only problem so far is lack of fixing for the bar end weights, but should be easy enough to sort. Clearance will be tight I think, but should be a small gap!!!
Heres a quick pic of the difference,

Will post up when other one arrives and I test fit both.
Cheers
Ian